DOCS: Create New-MiyooGameListXml.ps1 (OnionUI#927)

* Create Create-MiyooGameListXml.ps1

Added simple PowerShell script to remove dependency on 3rd party tool XMLStarlet. This version takes less space and is presumably more efficient since it's not indented at the cost of human readability.

* Rename Create-MiyooGameListXml.ps1 to New-MiyooGameListXml.ps1

Changed the verb from 'Create' to 'New' to follow established PowerShell standards.

files/20230617/New-MiyooGameListXml.ps1

@@ -0,0 +1,16 @@
+[xml]$xml = Get-Content 'gamelist.xml'
+
+$nodesToDelete = @('desc', 'rating', 'genre', 'players', 'releasedate', 'developer', 'publisher', 'hash', 'thumbnail', 'genreid')
+
+foreach ($node in $nodesToDelete) {
+    $xml.SelectNodes("//$node") | ForEach-Object { $_.ParentNode.RemoveChild($_) }
+}
+
+$gamesWithoutImage = $xml.SelectNodes("//game[not(image)]")
+foreach ($game in $gamesWithoutImage) {
+    $newImage = $xml.CreateElement('image')
+    $newImage.InnerText = 'no-img.png'
+    $game.AppendChild($newImage)
+}
+
+$xml.OuterXml | Set-Content 'miyoogamelist.xml'